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The rocky sills act as natural dams;
if they are removed, extensive areas of Pantanal will no longer be subject to seasonal flooding.
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Blasting rocky sills as a
means of deepening the navigation channel will have an irreversible impact on the Upper Paraguay river.
- The acceleration of runoff concentration will intensify most floods,
reduce the recurrence interval of droughts, and lead to regional climatic changes in the direction
of greater aridity.
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